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import random
import evaluate
import pandas as pd
from joblib.memory import Memory
from transformers import NllbTokenizer
from languages import languages, script_name
from datasets_.flores import flores_sentences
from models import complete, transcribe
cache = Memory(location=".cache", verbose=0).cache
bleu = evaluate.load("bleu")
chrf = evaluate.load("chrf")
wer = evaluate.load("wer")
tokenizer = NllbTokenizer.from_pretrained("facebook/nllb-200-distilled-600M")
# sample languages to translate to
target_languages = languages[languages["in_benchmark"]].sample(
frac=1, weights="speakers", replace=True, random_state=42
)
@cache
async def translate_and_evaluate(model, original_language_bcp_47, sentence_nr):
original_language = languages[languages["bcp_47"] == original_language_bcp_47].iloc[
0
]
target_language = target_languages.iloc[sentence_nr]
original_sentence = flores_sentences(original_language)[sentence_nr].strip()
target_sentence = flores_sentences(target_language)[sentence_nr].strip()
script = script_name(target_language.flores_path.split("_")[1])
reply = await complete(
model=model,
messages=[
{
"role": "user",
"content": f"Translate the following text to the {target_language.language_name} language; use the {script} script; reply only with the translation:\n\n{original_sentence}",
}
],
temperature=0,
max_tokens=1024,
)
prediction = reply.choices[0].message.content.strip()
if prediction.strip():
bleu_score = bleu.compute(
predictions=[prediction],
references=[target_sentence],
tokenizer=tokenizer.tokenize,
)
else:
bleu_score = {"bleu": 0}
chrf_score = chrf.compute(predictions=[prediction], references=[target_sentence])
return [
{
"model": model,
"bcp_47": original_language["bcp_47"],
"task": "translation",
"metric": metric,
"score": score,
"sentence_nr": sentence_nr,
}
for metric, score in zip(
["bleu", "chrf"], [bleu_score["bleu"], chrf_score["score"] / 100]
)
]
metadata = pd.read_csv("data/floresp-v2.0-rc.3/metadata_dev.tsv", sep="\t")
@cache
async def classify_and_evaluate(model, language_bcp_47, nr):
language = languages[languages["bcp_47"] == language_bcp_47].iloc[0]
sentences = pd.DataFrame(flores_sentences(language), columns=["text"])
sentences = pd.concat([metadata, sentences], axis=1)
sentences = sentences.dropna(subset=["topic"])
sentences["topic"] = sentences["topic"].str.lower()
paragraphs = (
sentences.groupby("URL").agg({"text": " ".join, "topic": "first"}).reset_index()
)
top_topics = paragraphs.value_counts("topic").head(5).index
paragraphs = paragraphs[paragraphs["topic"].isin(top_topics)]
examples = pd.concat(
[
paragraphs[paragraphs["topic"] == t].sample(n=5, random_state=42)
for t in top_topics
]
).sample(frac=1, random_state=42)
test_paragraphs = paragraphs[~paragraphs["URL"].isin(examples["URL"])].sample(
frac=1, random_state=42
)
test_paragraph = test_paragraphs.iloc[nr]
def topic_to_number(topic):
return top_topics.get_loc(topic)
messages = []
for example in examples.itertuples():
messages += [
{"role": "user", "content": example.text},
{"role": "assistant", "content": str(topic_to_number(example.topic))},
]
reply = await complete(
model=model,
messages=[
*messages,
{
"role": "user",
"content": test_paragraph.text,
},
],
temperature=0,
max_tokens=5,
)
try:
pred = int(reply.choices[0].message.content.strip())
except ValueError:
pred = -1
true = topic_to_number(test_paragraph.topic)
return [
{
"model": model,
"bcp_47": language["bcp_47"],
"task": "classification",
"metric": "accuracy",
"score": int(pred == true),
"sentence_nr": nr,
}
]
def corrupt_sentence(sentence):
# replace 5% of the sentence with <mask>
mask_length = round(len(sentence) * 0.05)
start = random.randint(0, len(sentence) - mask_length)
end = start + mask_length
return sentence[:start] + "<mask>" + sentence[end:]
@cache
async def mlm_and_evaluate(model, language_bcp_47, nr):
language = languages[languages["bcp_47"] == language_bcp_47].iloc[0]
sentences = pd.DataFrame(flores_sentences(language), columns=["text"])
sentences["corrupt_text"] = sentences["text"].apply(corrupt_sentence)
examples = sentences.sample(n=10, random_state=42)
test_sentences = sentences[~sentences["text"].isin(examples["text"])].sample(
frac=1, random_state=42
)
test_sentence = test_sentences.iloc[nr]
messages = []
for example in examples.itertuples():
messages += [
{"role": "user", "content": example.corrupt_text},
{"role": "assistant", "content": example.text},
]
reply = await complete(
model=model,
messages=[
*messages,
{
"role": "user",
"content": test_sentence.corrupt_text,
},
],
temperature=0,
max_tokens=1024,
)
prediction = reply.choices[0].message.content.strip()
chrf_score = chrf.compute(predictions=[prediction], references=[test_sentence.text])
return [
{
"model": model,
"bcp_47": language["bcp_47"],
"task": "language_modeling",
"metric": "chrf",
"score": chrf_score["score"] / 100,
"sentence_nr": nr,
}
]
@cache
async def transcribe_and_evaluate(model, language_bcp_47, nr):
language = languages[languages["bcp_47"] == language_bcp_47].iloc[0]
fleurs = pd.read_csv(
f"data/fleurs/{language.fleurs_tag}/dev.tsv",
sep="\t",
names=[
"id",
"fname",
"raw_transcription",
"transcription",
"words",
"id2",
"gender",
],
)
item = fleurs.iloc[nr]
path = f"data/fleurs/{language.fleurs_tag}/audio/dev/{item.fname}"
pred = await transcribe(path, model=model)
wer_score = wer.compute(predictions=[pred], references=[item.transcription])
return [
{
"model": model,
"bcp_47": language["bcp_47"],
"task": "asr",
"metric": "wer",
"score": wer_score,
"sentence_nr": nr,
}
]
tasks = [
translate_and_evaluate,
classify_and_evaluate,
mlm_and_evaluate,
# transcribe_and_evaluate,
] |